stand: Narrow the 'signal emulation' we provide

We only need to provide sig_atomic_t in emulation. However, including
machine/signal.h brings in too much namespace pollution related to
signals. Instead, define sig_atomic_t as long. Setting long is async
atomic on all platforms (though powerpc64 defines it to an int), though
that doesn't matter since the boot loader doesn't use signals.

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This commit is contained in:

Warner Losh

2024-11-19 20:05:11 -07:00

parent 6a88766ecd

commit c29cba408d

1 changed files with 7 additions and 2 deletions

									
										stand/libsa/stand.h
									
		+7
		-2
	
												View File
												
				@@ -82,8 +82,13 @@

				#define	EOFFSET	(ELAST+8)	/* relative seek not supported */

				#define	ESALAST	(ELAST+8)	/* */

				/* Partial signal emulation for sig_atomic_t */

				#include <machine/signal.h>

				/*

				 * LUA needs sig_atomic_t. This is defined to be long or int on all our

				 * platforms. On all but powerpc, these are all the same thing as long. 64-bit

				 * powerpc defines this as int, but long can also be accessed atomically. It's

				 * also OK because we don't have signal handlers in the boot loader.

				 */

				typedef long sig_atomic_t;

				__BEGIN_DECLS